Thanks for quick reply.
I'll explain a little about my block HT-RCBO&RCCB
I use block with Visibility parameter, a lot of attribute and table parameter to make persist constraint between Attribute and Visibility state. This block work well if I select individual block and choose value base on table parameter.
Now I want to modify several block by export attribute via ATTOUT command, edit it and import via ATTIN command. Unfortunately, Visibility parameter cannot export so I can't change this parameter.
I have an idea use TYPE attribute to control the Visibility parameter. After change TYPE attribute and import to AutoCAD ,use LISP command or VBA to update Visibility parameter base on TYPE attribute. But I don't know how to begin
Please help me, thank you a lots.